X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet.h;h=31438e52d6179786cf35c394588986a99ff945c6;hb=b70b090a28ff4cbdce29a3ad030f7d51ce9079b2;hp=75d59df235a137bdea86be13076f89d6deb4bdc5;hpb=ba918dce287788aaf6a90b3c7a9f349b197068d6;p=meshlink diff --git a/src/net.h b/src/net.h index 75d59df2..cae63bf1 100644 --- a/src/net.h +++ b/src/net.h @@ -1,7 +1,9 @@ +#ifndef MESHLINK_NET_H +#define MESHLINK_NET_H + /* net.h -- header for net.c - Copyright (C) 1998-2001 Ivo Timmermans - 2000,2001 Guus Sliepen + Copyright (C) 2014, 2017 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -13,118 +15,101 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id: net.h,v 1.9.4.33 2001/06/08 18:02:10 guus Exp $ + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#ifndef __TINC_NET_H__ -#define __TINC_NET_H__ - -#include - -#include "config.h" +#include "event.h" +#include "sockaddr.h" -#define MAXSIZE 1700 /* should be a bit more than the MTU for the tapdevice */ -#define MTU 1600 -#define SALTLEN 2 /* to spice things up for the NSA... */ - -#define MAC_ADDR_S "%02x:%02x:%02x:%02x:%02x:%02x" -#define MAC_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \ - ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3], \ - ((unsigned char*)&(x))[4],((unsigned char*)&(x))[5] - -#define IP_ADDR_S "%d.%d.%d.%d" - -#ifdef WORDS_BIGENDIAN -# define IP_ADDR_V(x) ((unsigned char*)&(x))[0],((unsigned char*)&(x))[1], \ - ((unsigned char*)&(x))[2],((unsigned char*)&(x))[3] +#ifdef ENABLE_JUMBOGRAMS +#define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */ #else -# define IP_ADDR_V(x) ((unsigned char*)&(x))[3],((unsigned char*)&(x))[2], \ - ((unsigned char*)&(x))[1],((unsigned char*)&(x))[0] +#define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */ #endif -#define MAXBUFSIZE 4096 /* Probably way too much, but it must fit every possible request. */ - -/* tap types */ -#define TAP_TYPE_ETHERTAP 0 -#define TAP_TYPE_TUNTAP 1 +/* MAXSIZE is the maximum size of an encapsulated packet: MTU + seqno + HMAC + compressor overhead */ +#define MAXSIZE (MTU + 4 + 32 + MTU/64 + 20) -typedef struct mac_t -{ - unsigned char x[6]; -} mac_t; - -typedef unsigned long ipv4_t; - -typedef struct ipv6_t -{ - unsigned short x[8]; -} ipv6_t; - -typedef unsigned short port_t; - -typedef short length_t; +/* MAXBUFSIZE is the maximum size of a request: enough for a MAXSIZEd packet or a 8192 bits RSA key */ +#define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) typedef struct vpn_packet_t { - length_t len; /* the actual number of bytes in the `data' field */ - unsigned char salt[SALTLEN]; /* two bytes of randomness */ - unsigned char data[MAXSIZE]; + uint16_t probe: 1; + int16_t tcp: 1; + uint16_t len; /* the actual number of bytes in the `data' field */ + uint8_t data[MAXSIZE]; } vpn_packet_t; -typedef struct queue_element_t { - void *packet; - struct queue_element_t *prev; - struct queue_element_t *next; -} queue_element_t; - -typedef struct packet_queue_t { - queue_element_t *head; - queue_element_t *tail; -} packet_queue_t; - -typedef struct enc_key_t { - int length; - char *key; - time_t expiry; -} enc_key_t; - -extern int tap_fd; - -extern int total_tap_in; -extern int total_tap_out; -extern int total_socket_in; -extern int total_socket_out; - -extern int seconds_till_retry; - -extern char *request_name[256]; -extern char *status_text[10]; - -#include "connection.h" /* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */ - -extern int str2opt(const char *); -extern char *opt2str(int); -extern void send_packet(connection_t *, vpn_packet_t *); -extern void receive_packet(connection_t *, vpn_packet_t *); -extern void receive_tcppacket(connection_t *, char *, int); -extern void accept_packet(vpn_packet_t *); -extern void broadcast_packet(connection_t *, vpn_packet_t *); -extern int setup_network_connections(void); -extern void close_network_connections(void); -extern void main_loop(void); -extern void terminate_connection(connection_t *); -extern void flush_queue(connection_t *); - -#include -#ifdef HAVE_OPENSSL_RSA_H -# include -#else -# include +/* Packet types when using SPTPS */ + +#define PKT_COMPRESSED 1 +#define PKT_PROBE 4 + +typedef enum packet_type_t { + PACKET_NORMAL, + PACKET_COMPRESSED, + PACKET_PROBE +} packet_type_t; + +#include "conf.h" +#include "list.h" + +typedef struct outgoing_t { + struct node_t *node; + enum { + OUTGOING_START, + OUTGOING_CANONICAL, + OUTGOING_RECENT, + OUTGOING_KNOWN, + OUTGOING_END, + OUTGOING_NO_KNOWN_ADDRESSES, + } state; + int timeout; + timeout_t ev; + struct addrinfo *ai; + struct addrinfo *aip; +} outgoing_t; + +/* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */ +#include "connection.h" +#include "node.h" + +extern void init_outgoings(struct meshlink_handle *mesh); +extern void exit_outgoings(struct meshlink_handle *mesh); + +extern void retry_outgoing(struct meshlink_handle *mesh, outgoing_t *); +extern void handle_incoming_vpn_data(struct event_loop_t *loop, void *, int); +extern void finish_connecting(struct meshlink_handle *mesh, struct connection_t *); +extern void do_outgoing_connection(struct meshlink_handle *mesh, struct outgoing_t *); +extern void handle_new_meta_connection(struct event_loop_t *loop, void *, int); +extern int setup_tcp_listen_socket(struct meshlink_handle *mesh, const struct addrinfo *aip) __attribute__((__warn_unused_result__)); +extern int setup_udp_listen_socket(struct meshlink_handle *mesh, const struct addrinfo *aip) __attribute__((__warn_unused_result__)); +extern bool send_sptps_data(void *handle, uint8_t type, const void *data, size_t len); +extern bool receive_sptps_record(void *handle, uint8_t type, const void *data, uint16_t len) __attribute__((__warn_unused_result__)); +extern void send_packet(struct meshlink_handle *mesh, struct node_t *, struct vpn_packet_t *); +extern char *get_name(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern void load_all_nodes(struct meshlink_handle *mesh); +extern bool setup_myself_reloadable(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern bool setup_network(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern void reset_outgoing(struct outgoing_t *); +extern void setup_outgoing_connection(struct meshlink_handle *mesh, struct outgoing_t *); +extern void close_network_connections(struct meshlink_handle *mesh); +extern void main_loop(struct meshlink_handle *mesh); +extern void terminate_connection(struct meshlink_handle *mesh, struct connection_t *, bool); +extern bool node_read_public_key(struct meshlink_handle *mesh, struct node_t *) __attribute__((__warn_unused_result__)); +extern bool node_read_from_config(struct meshlink_handle *mesh, struct node_t *, const config_t *config) __attribute__((__warn_unused_result__)); +extern bool read_ecdsa_public_key(struct meshlink_handle *mesh, struct connection_t *) __attribute__((__warn_unused_result__)); +extern bool read_ecdsa_private_key(struct meshlink_handle *mesh) __attribute__((__warn_unused_result__)); +extern bool node_write_config(struct meshlink_handle *mesh, struct node_t *) __attribute__((__warn_unused_result__)); +extern void send_mtu_probe(struct meshlink_handle *mesh, struct node_t *); +extern void handle_meta_connection_data(struct meshlink_handle *mesh, struct connection_t *); +extern void retry(struct meshlink_handle *mesh); +extern int check_port(struct meshlink_handle *mesh); + +#ifndef HAVE_MINGW +#define closesocket(s) close(s) #endif -extern int read_rsa_public_key(connection_t *); - -#endif /* __TINC_NET_H__ */ +#endif